: On the host computer, open the Command Prompt ( cmd ), type ipconfig , and look for the IPv4 Address (e.g., 192.168.1.5 ).
If you use mods (like Serious Fusion), ensure every player has the same version and file structure. Any mismatch, including different .gro file sizes, will break LAN. how to play serious sam 3 multiplayer lan without steam
Copy the entire Serious Sam 3 folder (including the SSE files) to every LAN client. They do not need Steam installed at all. : On the host computer, open the Command